Experimental demonstration of a quantum router

Yuan, Xinxing; Ma, Jiajun; Hou, Panyu; Chang, Xiuying; Zu, Chong; Duan, Luming

doi:10.1038/srep12452

Cited by 49 publications

(22 citation statements)

References 28 publications

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“…Quantum communication is getting improved day by day with the improvement in current technological advancement. Quantum networking has a broad spectrum of applications, quantum devices such as quantum routers [3][4][5][6], quantum repeaters [7][8][9][10][11], quantum satellite have been developed recently by China [12][13][14], which claims itself to be secure. Security is an essential aspect of today's communication; in the present scenario, most of the data is shared and stored on the cloud, so there is always a threat to break into the data; for which high security of the data is essential.…”

Section: Introductionmentioning

confidence: 99%

Complexity analysis of quantum teleportation via different entangled channels in the presence of noise

Singh¹,

Kumar²,

Behera³

2021

Preprint

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Quantum communication is one of the hot topics in quantum computing, where teleportation of a quantum state has a slight edge and gained significant attention from researchers. A large number of teleportation schemes have already been introduced so far. Here, we compare the teleportation of a single qubit message among different entangled channels such as the two-qubit Bell channel, three-qubit GHZ channel, two-and three-qubit cluster states, the highly entangled five-qubit Brown et al. state and the six-qubit Borras et al. state. We calculate and compare the quantum costs in each of the cases. Furthermore, we study the effects of six noise models, namely bit-flip noise, phase-flip noise, bit-phase flip noise, amplitude damping, phase damping and the depolarizing error that may affect the communication channel used for the teleportation. An investigation on the variation of the initial state's fidelity with respect to the teleported state in the presence of the noise model is performed. A visual representation of the variation of fidelity for various values of the noise parameter η is done through a graph plot. It is observed that as the value of noise parameter in the range η ∈ [0, 0.5], the fidelity decreases in all the entangled channels under all the noise models. After that, in the Bell channel, GHZ channel and three-qubit cluster state channel, the fidelity shows an upward trend under all the noise models. However, in the other three channels, the fidelity substantially decreases in the case of amplitude damping, phase damping and depolarizing noise, and even it reaches zero for η = 1 in Brown et al. and Borras et al. channels.

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Section: Introductionmentioning

confidence: 99%

Complexity analysis of quantum teleportation via different entangled channels in the presence of noise

Singh¹,

Kumar²,

Behera³

2021

Preprint

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“…One of the most relevant devices for the operation of a quantum network is a quantum router, whose primary function in the simplest configuration is to send or route an incident photon into one of the two output channels [10]. Recently, there have been several theoretical and experimental proposals for quantum routers based on several different structures, such as CRWs [11][12][13][14][15][16], whispering gallery resonators [17][18][19][20][21], waveguide-emitter systems [22,23], superconducting qubits [24], and quantum electrodynamics systems [25,26]. In the latter context, Zhou and co-workers [11,12] proposed an experimentally accessible single-photon routing scheme comprising two quantum channels connected by a resonant cavity with a single-type three-level atom embedded in it.…”

Section: Introductionmentioning

confidence: 99%

Tunable single-photon quantum router

et al. 2019

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We propose an efficient single-photon router comprising two resonator waveguide channels coupled by several sequential cavities with embedded three-level atoms. We show that the system can operate as a perfect four-way single-photon switch. We also demonstrate that an incident single photon propagating in one of the waveguides can be routed into one or the other output channels; such routing can be controlled by the external classical electromagnetic field driving the atoms. We argue that, under appropriate conditions, the efficiency of such routing can be close to 100% within a broad operational bandwidth, suggesting various applications in photonics.

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“…In recent years, single plasmon switch and quantum network based on the one dimen sional waveguide has become a hot topic of increasing attraction for researchers in the fie lds of quantum information processing, which is extensively investigated not only in theo retically [22][23][24], but also experimentally [25][26][27][28][29][30]. Recently, the first single photon router in the microwave regime via a superconducting transmon qubit coupled extremely efficie ntly to a superconducting transmission line [25] was experimentally realized and the first experimental demonstration of plasmon-exciton coupling between silver nanowire (NW) and a pair of SQD [26] was also reported, where the interparticle distance between the tw o SQDs range from microns to 200 nm within the diffraction limit and parameters includi ng the SP propagation length and the wire terminal reflectivity are experimentally determ ined.…”

Section: Introductionmentioning

confidence: 99%

Feasible Surface Plasmon Routing Based on the Self-Assembled InGaAs/GaAs Semiconductor Quantum Dot Located Between Two Silver Metallic Waveguides

Ko¹,

Kim²,

Choe³

et al. 2019

Plasmonics

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We proposed an experimentally feasible scheme of nano-plamonic switch and quantum router via the single self-assembled InGaAs/GaAs semiconductor quantum dot (SQD) with a V type three-level energy structure located between two silver metallic wa veguides. We studied theoretically transmission and transfer rates of single plasmons in s uch a multi-ports system via the real-space approach, where our results showed that singl e plasmons from the input port could be switchable and redirected by controlling parame ters, such as the intensity of the classical field, the detunings, and the interaction between the SQD and the waveguides. Our proposed scheme could be used not only in the design of quantum routers and quantum switches for the construction of quantum network, but al so in quantum photonic integrated circuits.

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Experimental demonstration of a quantum router

Cited by 49 publications

References 28 publications

Complexity analysis of quantum teleportation via different entangled channels in the presence of noise

Complexity analysis of quantum teleportation via different entangled channels in the presence of noise

Tunable single-photon quantum router

Feasible Surface Plasmon Routing Based on the Self-Assembled InGaAs/GaAs Semiconductor Quantum Dot Located Between Two Silver Metallic Waveguides

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